Haohui Mai created HDFS-6034:
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Summary: DN registration should use DataNodeLayoutVersion instead
of NameNodeLayoutVersion
Key: HDFS-6034
URL: https://issues.apache.org/jira/browse/HDFS-6034
Project: Hadoop HDFS
Issue Type: Sub-task
Affects Versions: HDFS-5535 (Rolling upgrades)
Reporter: Haohui Mai
Currently the registrationID is in the form of {{BlockPoolID-NNLayoutVersion}}.
When the NN bumps the layout version during rolling upgrade, the DNs will fail
to register with the new NN and exit, regardless whether the new software
version is used.
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